Substituted methyl ethers of 2-branched-alkyl-4,6-dinitrophenols

ABSTRACT

Substituted methyl ethers of 2-branched-alkyl-4,6-dinitrophenol, i.e. ethers wherein the methyl group, which may be substituted by an optionally halogen-substituted alkyl radical, is substituted by an alkoxy or amido group, which possess arthropodicidal, and especially acaricidal and insecticidal, properties and a process for their production.

United States Patent Zumach et al.

[54] SUBSTITUTED METHYL ETHERS OF 2- BRANCHED-ALKYL-4,6- DINITROPHENOLS [72] inventors: Gerhard Zumach; Ingeborg Hamman, both of Cologne; Gunter Unterstenhofer, Opladen; Richard Wegler, Leverkusen, all of Germany [73] Assignee: Farbenfabriken Bayer Aktiengesellschaft, Leverkusen, Germany [22] Filed: April 24, 1970 [21] Appl.No.: 31,784

[30] Foreign Application Priority Data May 6, 1969 Germany ..P 19 22 927.7

[52] US. Cl. ..260/613 D, 260/613 R, 260/570.7, 260/471 C, 260/562 A, 260/470, 260/999,

[51] Int. Cl ..C07c 43/30 [58] Field of Search ..260/613 D, 613 R [15] 3,683,031 [4 1 Aug. 8, 1972 Primary Examiner-Remand Helfin I Attorney-Burgess, Dinklage & Sprung [57] ABSTRACT Substituted methyl ethers of 2-branched-alkyl-4,6- dinitrophenol, i.e. ethers wherein the methyl group, which may be substituted by an optionally halogensubstituted alkyl radical, is'substituted by an alkoxy or amido group, which possess arthropodicidal, and especially acaricidal and insecticidal, properties and a process for their production.

6 Claims, No Drawings SUBSTITUTED METHYL ETHERS OF 2- BRANCHED-ALKYL-4,6-DINlTROPI-IENOLS The present invention relates to and has for its objects the provision of particular new substituted methyl ethers of 2-branched-alkyl-4,6-dinitrophenol, i.e. ethers wherein the methyl group, which may be substituted by an optionally halogen-substituted alkyl radical, is substituted by an alkoxy or arnido group, which possess arthropodicidal, especially insecticidal and acaricidal, properties, active compositions in the form of mixtures of such compounds with solid and liquid dispersible carrier vehicles, and methods for producing such compounds and for using such compounds in a new way especially for combating pests, e.g. arthropods, with other and further objects becoming apparent from a study of the within specification and accompanying examples.

It is known that certain 2-alkyl-4,6-dinitrophenol derivatives, for example the ester of the formula:

can be used as acaricides (see The Journal of Horticultural Science 34, 39-50 (1959).

lt has now been found, in accordance with the present invention, that the particular new 2-alkyl-4,6- dinitrophenol derivatives of the formula:

in which X represents oxygen or -Nl-l-,

R represents a branched alkyl radical with three to 12 carbon atoms,

R represents hydrogen or methyl,

R" represent hydrogen or an optionally halogen-substituted alkyl radical, and

R, when X denotes oxygen, represents an opof formula (I) in which reacting a 2-alkyl-4,6- dinitrophenol of the formula:

ll 7 -N 02 I N02 (II) with a compound of the formula:

RI! ci-e n x-gw (111 in which R, R, R" and R' have the abovementioned significance, optionally in the presence of a solvent and an acid-binding agent.

Surprisingly, the 2-alkyl-4,6-dinitrophenol derivatives obtainable according to the present invention show higher acaricidal and insecticidal activity than the chemically similar 2-alkyl-4,6-dinitrophenol derivatives known in the art. The substance according to the invention thus represent an enrichment of the art.

If 2-sec.-butyl-4,6-dinitrophenol and chloromethylpropargyl-ether are used as starting substances, the course of the reaction can be represented by the following equation:

The phenols to be used for the reaction according to the invention are defined by the formula (II) given above. ln the above formulae, R preferably represents alkyl with three to eight carbon atoms, especially isopropyl, sec.-butyl, tert.-buty1, pentyl-(2), hexyl- (2),heptyl-(2), octyl-(2) and octyl-(3). R represent hydrogen or methyl.

As examples of the phenols which can be used according to the invention, the following may be named:

2-lsopropyl-4,6-dinitrophenol, 2-sec.-butyl-4,6- dinitrophenol, 2-sec. -butyl-5-methyl-4,6- dinitrophenol, 2-tert.-butyl-4,6dinitrophenol, 2tert.- butyl-5-methyl-4,6-dinitrophenol, 2-(pentyl-( 2) )-4 ,6- dinitrophenol, 2-(penty1-(2))-5-methyl-4,6- dinitrophenol, 2-(octyl-(3))-4,6-dinitrophenol, 2-(octyl-(4))-4,6-dinitrophenol, 2-(decyl-(2))-4,6- dinitrophenol and 2-(decyl-(4))4,6-dinitrophenol.

The a-chloro ethers or N-a-chloroalkylamides to be used'for the reaction according to the invention are defined by the formula (III) given above. In the above formulae R" represents hydrogen or alkyl with one to three carbon atoms which may be substituted by halogen, preferably by chlorine or bromine, for example methyl, ethyl, propyl, isopropyl, trichloromethyl, and the like.

If X represents oxygen, R preferably denotes alkyl with one to 12 carbon atoms; or alkenyl or alkinyl with three to five carbon atoms; or cycloalkyl radicals with five to seven carbon atoms in the ring system; or aralkyl radicals which contain one to four carbon atoms in the aliphatic chain and wherein the aromatic radical is preferably a phenyl radical; the radicals may be substituted by halogen, preferably by chlorine or bromine.

If X represents the NI-I- group, R preferably denotes the aliphatic carboxylic acid residue of an alkaneor alkene carboxylic acid with one to five carbon atoms, which is optionally substituted by halogen (fluorine, chlorine or bromine); or a benzoic acid residue which is optionally substituted by chlorine or nitro groups; or an alkoxy-carbonyl or alkylmer-captocarbonyl radical with two to 13 carbon atoms; or an alkenoxy-carbonyl or alkenylmercaptocarbonyl radical with four or five carbon atoms; or a phenoxycarbonyl or phenylmercaptocarbonyl radical. These oxycarbonyl or mercapto-carbonyl-containing radicals may be substituted by halogen, preferably chlorine and fluorine. The phenyl radicals noted above may be further substituted by alkyl with one to 12 carbon atoms and halogenalkyl, preferably lower halogenalkyl residues, especially with chlorine and/or fluorine as halogen, for example, trichloromethyl, trifluoromethyl, and the like.

As examples of the a-chloro ethers and Nachloroalkylamides which may be used according to the invention, the following may be mentioned:

Chlorodimethyl-ether, chloromethyl-ethyl-ether, chloromethyl-2-chloroethyl-ether, chloromethylpropyl-ether, chloromethyl-isopropyl-ether, chloromethyl-isobutyl-ether, chloromethyl-Z-methylpentyl-(2)-ether, chloromethyl-2,2-dimethyl-butyl-( 1 ether, chloromethyl-2,2,-dimethyloctyl-l )-ether, chloromethyl-dodecyl-ether, l-chloroethyl-methylether, lchloroethyl-ethyl-ether, l-chloroethyl-octyll )-ether l,2,2,2-tetrachloroethyl-methyl-ether, l,2,2,2-tetrachloroethyl-isopropylether, l-chlorobutylmethyl-ether, chloromethyl-allyl-ether, chloromethylpropargyl-ether, 1,2,2,2,-tetrachloro-ethyl-allyl-ether, l ,2,2,2-tetrachloroethyl-propargyl-ether, chloromethyl-Z,3-dibromallyl-ether, chloromethyl-4- chlorobutine-( 2)-( l )-ether, chloromethylcyclohexylether, chloromethyl-benzyl-ether, chloromethyl-4- chlorobenzyl-ether, chloromethyl-acetamide, lchloropropylacetamide, chloromethyltrichloroacetic acid amide, chloromethylisobutyric acid amide, chloromethyl-acrylic acid amide, chloromethylcrontonic acid amide, chloro-methylbenzamide, chloromethyl-4-chlorobenzamide, chloromethyl-carbamic acid methyl ester, chloromethyl-carbamic acid ethyl ester, chloromethyl-monothiocarbamic acid-S- methyl ester, l,2,2,2-tetrachloroethyl-formamide, acetamide, -chloroacetic acid amide, -trichloroacetic acid amide, -fluoracetamide, -propionic acid amide, -3- chloropropionic acid amide, -pivalic acid amide, -acrylic acid amide, -crotonic acid amide, -benz-amide, -3,4- dichlorobenzamide, -2,5-dichloro-benzamide, -nitrobenzamide, -4-nitrobenzamide, -l-chIoro-5- nitrobenzamide, -carbamic acid methyl ester, -carbamic acid 2-chloroethyl ester, -carbamic acid isopropyl ester, -carbamic acid dodecyl ester,-carbamic acid ally] ester, carbamic acid phenyl ester, -carbamic acid 4- chlorophenyl ester, -carbamic acid 4-trifluoromethylphenyl ester, l,2,2,2-tetrachloroethyl-carbamic acid 2,4-dichlorophenyl ester, l,2,2,2- tetrachloroethyl-monothiocarbamic acid-S-methyl ester, -S-butyl ester, -S-dodecyl ester, -S-allyl ester, -S- phenyl ester, -S-4-tert.-butylphenyl ester and l,2,2,2- tetrachloroethyl-monothiocarbamic acid -S-(4- chlorophenyl) ester.

The a-chloro ethers used as starting substances are largely known and can be manufactured in a simple manner from the corresponding alcohols with aldehydes in the presence of dry hydrogen chloride, directly or in an inert solvent. Equally, the N-achloroalkylamides are generally known and can be obtained from the corresponding amides and aldehydes via the N-a-hydroxyalkylamides and subsequent chlorination with thionyl chloride.

The reaction according to the invention is preferably carried out in the presence of a solvent (which term includes a mere diluent). When working with solvents, those which do not react with the a-chloro ethers or N- a-chloroalkylamides are preferably used. As such solvents there may, for example, be mentioned: hydrocarbons such as benzene and toluene, chlorinated hydrocarbons such as dichloroethane, chloroform, chlorobenzene and dichlorobenzene, ethers such as tetrahydro-furan, dibutyl ether and dioxane, and mixtures thereof.

All customary tertiary amines can be used as a hydrogen chloride acceptor (acid-binding agent) such as dimethylaniline, pyridine, and the like. Triethylamine is particularly suitable.

The reaction temperatures can be varied over a wide range. In general the process is carried out at 0 to C, preferably at 40 to 60 C, or at the boiling point of the solvent, if one is used.

In general, the reagents are used in approximately equimolar quantity ratios. In some cases, especially when using the a-chloro ethers, an excess of compound containing active chlorine proves advantageous. The reaction can, for example, be carried out by adding dropwise to a solution of the appropriate a-chloroether or N-a-chloroalkylamide in benzene or dioxane at room temperature a solution of the corresponding phenol and triethylamine in the same solvent subsequently stirring for several hours at 50 60 C, filtering off the triethylammonium chloride which has precipitated and evaporating the solvent in vacuo. The products which result are mostly oils and can be purified by reprecipitation from hot cleaning benzine. Crystalline compounds may be recrystallized from a suitable solvent.

The active substances according to the invention show strong insecticidal and acaricidal actions while having low toxicity to warm-blooded animals and low phytotoxicity. The actions manifest themselves rapidly and continue for a long time. They can therefore be used with good success for combating harmful sucking and biting insects, diptera as well as mites in the plant protection field and in hygiene endeavors, and, because of their high alkali resistance, especially for the treatment of lime-washed walls.

are classed, in the main butterfly caterpillars, such as Plutella maculipennis, Lymantria dispar; beetles, such as granary weevils (Sitophilus granarius), the Colorado beetle (Leptinotarsa decemlineata), and also species living in the soil, such as the wireworms (Agriotes sp.) and larvae of the cockchafer (Melolontha melolontha);

cocroaches, such as the German cockroach (Blatella germanica) Orthoptera, such as the house cricket (Acheta domesn'ca); termites such as Reticulitermes; Hymenoptera, such as ants; and the like.

The Diptera comprise, in particular, the flies, such as the vinegar fly (Drosophila melanogaster); the Mediterranean fruit fly (Ceratitis capitata), the house fly (Musca domestica), and mosquitoes, such as the yellow fever mosquito ((Aedes aegypti); and the like.

in the case of the mites, particularly important are the spider mites (Tetranychidae) such as the twospotted spider mite (Tetranychus urtica'e), the European red mite (Panonychus ulmi); gall mites, such as the currant gall mite (Eriophyes ribis) and tarsonemids, such as Tarsonemus pallidus, and ticks; and the like.

The active compounds according to the instant invention can be utilized, if desired, in the form of the usual formulations or compositions with conventional inert (i.e. plant compatible or herbicidally inert) pesticidal diluents or' extenders, i.e. diluents or extenders of the type usable in conventional pesticidal formulations or composition, e.g. conventional pesticidal dispersible carrier vehicles such as solutions, emulsions, suspensions, emulsifiable concentrates, spray powders, pastes, soluble powders, dusting agents, granules, etc. These are prepared in known manner, for instance by extending the active compounds with conventional pesticidal dispersible liquid diluent carriers and/or dispersible solid carriers optionally with the use of carrier vehicle assistants, e.g.conventional pesticidal surface-active agents, including emulsifying agents and/or dispersing agents, whereby, for example, in the case where water is used as diluent, organic solvents may be added as auxiliary solvents. The following may be chiefly considered for use as conventional carrier vehicles for this purpose: inert dispersible liquid diluent carriers, including inert organic solvents, such as aromatic hydrocarbons (e.g. benzene, toluene, xylene, etc.), halogenated, especially chlorinated, aromatic hydrocarbons .(e.g. chlorobenzenes, etc.), paraffins (e.g. petroleum fractions), chlorinated aliphatic hydrocarbons (e.g. methylene chloride, etc.), alcohols (e.g. methanol, ethanol, propanol, butanol, etc.), amines (e.g. ethanolamine, etc.), ether, ether-alcohols (e.g. glycol monomethyl ether, etc.), amides (e.g. dimethyl formamide, etc.), sulfoxides (e.g. dimethyl sulfoxide, etc.), ketones (e.g. acetone, etc.) and/or water; as well as inert dispersible finely divided solid carriers, such as ground natural minerals (e.g. kaolins, alumina, silica, chalk, i.e. calcium carbonate, talc,

kiesel-guhr, etc.) and ground synthetic minerals (e.g. highly dispersed silicic acid, silicates, e.g. alkali silicates, etc.); whereas the following may be chiefly considered for use as conventional carrier vehicle assistants, e.g. surface-active agents, for this purpose: emulsifying agents, such as non-ionic and/or anionic emulsifying agents (e.g. polyethylene oxide esters of fatty acids, polyethylene oxide ethers of fatty alcohols, alkyl sulfonates, aryl sulfonates, etc., and especially alkyl arylpolyglycol ethers, magnesium stearate, sodium oleate, etc.); and/or dispersing agents, such as lignin, sulfite waste liquors, methyl cellulose, etc.

Such active compounds may be employed alone or in the form of mixtures with one another and/or with such solid and/or liquid dispersible carrier vehicles and/or with other known compatible active agents, especially plant protection agents, such as other acaricides and insecticides, or fungicides, herbicides, bactericides, etc., if desired, or in the form of particular dosage preparations for specific application made therefrom, such as solutions, emulsions, suspensions, powders, pastes, and granules which are thus ready for use.

Asconcerns commercially marketed preparations, these generally contemplate carrier composition mixtures in which the active compound is present in an amount substantially between about 01-95 percent by weight, and preferably 05-90 percent by weight, of the mixture, whereas carrier composition mixtures suitable for direct application or field application generally contemplate those in which the active compound is present in an amount substantially between about 0.0005-20 percent, preferably 0.00l-5 percent, by weight of the mixture. Thus, 'the present invention contemplates over-all compositions which comprise mixtures of a conventional dispersible carrier vehicle such as (l) a dispersible inert finely divided carrier solid, and/or (2) a dispersible carrier liquid such as an inert organic solvent and/or water preferably including a surface-active effective amount of a carrier vehicle assistant, e.g. a surface-active agent, such as an emulsifying agent and/or a dispersing agent, and an amount of the active compound which is effective for the purpose in question and which is generally between about 0.0005-95 percent, and preferably 0.00l-%, by weight of the mixture.

The active compounds can also be used in accordance with the well known ultra-low-volume process with good success, i.e. by applying such compound if normally a liquid, or by applying a liquid composition containing the same, via very effective atomizing equipment in finely divided fonn, e. g. average particle diameter from 50-100 microns, or even less, i.e.mist form, for example by airplane crop spraying techniques. Only up to at most about a few liters/hectare are needed, and often amounts only up to about 1 quart/acre, preferably 2-16 fluid ounces/acre, are sufiicient. In this process it is possible to use highly concentrated liquid compositions with said liquid carrier vehicles containing from about 40 to about percent by weight of the active compound or even the percent active substance alone, e.g. about 40-100 percent by weight of the active compound.

In particular, the present invention contemplates methods of selectively killing, combating or controlling pest, e.g. arthropods, i.e. insects and acarids, and more particularly, methods of combating at least one of insects and acarids which comprise applying to at least one of correspondingly (a) such insects, (b) such acarids, and (c) the corresponding habitat, i.e. the locus to be protected, a correspondingly combative or toxic amount, i.e. an arthropodicically, especially insecticidally or acaricidally, effective amount of the particular active compound of the invention alone or together with a carrier vehicle as noted above. The instant formulations or compositions are applied in the usual manner, for instance by spraying, atomizing, vaporizing, scattering, dusting, watering, sprinkling, pouring, fumigating, and the like.

It will be realized, of course, that the concentration of the particular active compound utilized in admixture with the carrier vehicle will depend upon the intended application. Therefore, in special cases it is possible to go above or below the aforementioned concentration ranges.

The 2-alkyl-4,6-dinitrophenol derivatives obtainable according to the invention furthermore exhibit fungitoxic properties, for example against genuine mildew fungi and soil fungi. They can be used as pickling agents or soil treatment agents for combating fungal plant diseases. Finally, they possess an anti-microbial and rodenticidal action, and furthermore a repellent action against warm-blooded animals.

The unexpected superiority and outstanding activity of the particular new compounds of the present invention is illustrated without limitation by the following examples:

EXAMPLE 1 Tetranychus test Solvent: 3 parts by weight of dimethylformamide Emulsifier: l part by weight alkylaryl polyglycol ether To produce a suitable preparation of active compound, 1 part by weight of the active compound is mixed with the stated amount of solvent containing the stated amount of emulsifier and the concentrate so obtained is diluted with water to the desired final concentration.

Bean plants (Phaseolus vulgaris), which have a height of approximately 10-30 cm., are sprayed with the preparation of the active compound until dripping wet. The bean plants are heavily infested with spider mites (Tetranychus urticae) in all stages of development.

After the specified periods of time, the effectiveness of the preparation of active compound is determined by counting the dead mites. The degree of destruction thus obtained is expressed as a percentage: 100 percent means that all the spider mites are killed, whereas 0 percent means that none of the spider mites are killed.

The active compounds, the concentrations of the active compounds, the evaluation times and the results can be seen from the following Table 1:

TABLE 1.TETRANYCIIUS TEST [Mites which damage plants] Active Degree of compound destruction concentration in percent after Active compounds in percent 48 hours A O 0. 02 100 I 0.002 0 OCCH=CHCH; ([3113 C| 1a-C H-Q-N 02 N ()2 (Known) 2 O-CH -OCH 0.02 99 OH; 2 3 0. 002 as C3H5-C H N 01 l N O;

3 0 H 0-c H, 0.02 100 U cm 1 C 2 0.002 05 C2H5- C H N O:

l N O;

C II 0. 02 100 (4) i l 0. 002 45 CII:0-CI[ CH:

| c In C 2H5-C H- -N O 2 [Mites which damage plants] Active compounds Phaedon larvae test Solvent 3 pans by weight of dimethylformamide' Emulsifier: 1 part by weight of alkylaryl polyglycol ether To produce a suitable preparation of active compound, 1 part by weight of the active compound is 65 Att-lvo Dugmn of compound (instruction concentration in percent. after in percent 48 hours (I. 02 Hit) Cabbage l'eaves (Brassica oleracea) are sprayed-with the preparation of the active compound until dripping wet and then infested with mustard beetle larvae (Phaedon cochleariae).

After the specified periods of time, the degree of destruction is determined as a percentage: 100 percent means that all the beetle larvae are killed; 0 percent means that none of the beetle larvae are killed.

The active compounds, the concentration of the active compounds, the times of evaluation and the results can be seen from the following Table 2:

EXAMPLE 3 Myluu lcxl (contact action) Solvent:

limulsil'icr;

ether 3 parts by weight of dimethylformamide I part by weight of alkylaryl polyglycol Cabbage plants (Brassica oleracea) which have been heavily infested with peach aphids (Myzus persicae) are sprayed with the preparation of the active compound until dripping wet.

5 After the specified periods of time, the degree of destruction is determined as a percentage: 100 percent means that none of the aphids are killed.

can be seen from the following Table 3:

TABLE 3.MYZUS TEST [Insects which damage plants] means that all the aphids are killed, whereas 0 percent The active compounds, the concentrations of the active compounds, the evaluation times and the results Active Degree of compound destruction concentration in percent after Active compounds in percent 24 hours (A)... a O 0.2 0

Il ()-CCl[=0ll-0lls (ill;

I CQIIH C li- N0g I NO, (Known) (3) OCHr-OC1Hs 0.2 100 (E 3 I C1H5CH -NO2 CCII OCH CH: I 43 i H: C7H5CH- NO,

(6) V t v CH3 (llih 0.2 100 I CII;OCHCII GII (1113 I i CH3 C,II CII -NO,

O-C1I 0CH C Hg-CH-Q-NO;

(8) O-CHg-0-CHg-CH=CH7 0.2 100 R I CgHs-CH NO:

I NO:

(11) t. OCH O--CH C C11 0. 2 1

I I CHa-C NO;

TABLE 3.-I\IYZUS TEST-Continued [Insects which damage plants] Actlvo Dogma of compouind dastmction Active compounds $3$o$t m l 'il'hilii l3) c QCI; (L2 0'] l OCHNHCH In t r; 211;" 1I l-xog '14, CCl; 0 u. luu

ocH-xH-C-cm C H1 l c QHFC H 0 l t N02 o n u. 2 um o-c1rNlIc-o cnn (3113 CalI5-UIi-@N0a l N O 2 (18) 013 o. 2 mo OCHNHCCH2F (III-Is l C 2H5CHNO 2 9) (h g -2 J8 ()CIVINHCC on (DB3 C2H5CH@-N 0 2 t The following further examples illustrate, without (.113 limitation, the process for producing the particular new 1 compounds of the present invention. Mus-4" H 02 EXAMPLE 4 To a solution of 31 g of chloromethyl-propargylether (0.3 mol) in 150 ml of toluene at room temperature there is added dropwise, while stirring, a solution of 48 g of 2-sec.-butyl-4,6-dinitrophenol (0.2'mol) and 20 g of triethylamine in 100 ml of toluene. The mixture is stirred for 1 hour at room temperature and subsequently for 1 hour at -70 C andis filtered; the filtrate is evaporated in a waterpump vacuum. The oily residue is dissolved in 100 ml of boiling cleaning benzine, the solution is filtered and cooled, and the oil which separates out is isolated and crystallized on trituration. 43 g of 2-sec-butyl-4,-dinitrophenoxymethylpropargyl-ether of the formula:

of melting point 5355 C are obtained as yellowbrown crystals.

The following compounds are manufactured in the 60 same manner as described above:

melting point 126127.5

R (])CH1OCH5 21 oil RW 13 H M lt' t102l04 C. -OH: Mt uiii i gtiili t 110 c.

19) CO1 i' ii i 7L 5 (1s) oHfF 113 1 5404 1L0,

OCH1-OR" 10. R I (20 Cl Ks-CH- N0 1 1mm 1.5720

Compound No. R D As may be used herein, the terms arthrop0d,"

u u I n L 5480 arthropodlcldal and arthropodlcide contemplate gg specifically both insects and acarids. Thus, the insects CHz-CH:=CH: 1. 5440 and acarids may be considered herein collectively as 1 5650 arthropods to be combated in accordance with the invention, and accordingly the insecticidal and/or acar- 15462 tcidal activity may be termed anhropodicidal activity, 23 1 5165 and the concomitant combative or effective amount (3H3 used will be an arthropodicidally effective amount which in effect means an insecticidally or acaricidally (12 I ir m)" 1. 5155 25 efiective amount of the active compound for the c mc=onnldesired purposes.

H 5539 It will be appreciated that the instant specification and examples are set forth by way of illustration and not limitation, and that various modifications and MPLE 5 changes may be made without departing from the spirit and scope of the present invention. A solution of 48 g of 2-sec.-butyl-4,6-dlnltrophenol whatis claimedis.

(0-20 9 and 20 g triethylamim in ml of l. Substituted methyl ethers of Z-branched alkyl-4,6- benzene is added dropwise at room temperature to a dinitrophenol ofthe formula.

solution of 56 g of l,2,2,Z-tetrachloroethyl-carbamic acid ethyl ester (0.22 mol) in 150 ml of benzene. The

mixture is stirred for a further 30 minutes at room tem- R perature and subsequently for 2 hours at 60 C, m and cooled. The triethylammonium chloride is filtered 0t? (27 g) and the filtrate is evaporated in vacuo. The 0 R' -N0z oily residue crystallizes after prolonged standing. 8] g of l-(2-sec.-butyl-4,6-dinitrophenoxy)-2,2,2- trichloroethyl-carbamic acid ethyl ester of the formula: I (I) CC]: 0 O-CH-NII I JOCzHr m wh'ch on. X represents oxygen, R represents a branched alkyl radical with three to 12 carbon atoms, 50 R represents hydrogen or methyl, R" represents hydrogen and NO: (15) R' represent alkyl of one to 12 carbon atoms or alkenyl of three to five carbon atoms or alkinyl of a three to five carbon atoms or benzyl all of which are Obtained as yellow crystals of meltmg polm 69 C may be optionally chlorine or bromine substituted.

(iso'pl'opanol/cleaning benzine)- I 2. Compound according to claim 1 wherein such The following compounds are Obtained the Same compound is 2-sec.-butyl-4,6-dinitrophenoxymethyl-4- manner as described in Example 5: h p pgy r cm. CH3 CH3 o-OH--NI'I-C-R ocmo-r ;n-omc :n em 1 on. A i 1 H3 0211,, ou i No, o,1r,-on NO,

HHMI "11.0

21 22 3. Compound according to claim 1 wherein such 5. Compound according to claim] wherein such compound is 2-sec.-butyl-4,6-dinitrophenoxymethyl-Z- compound is 2-sec.-butyl-4,6-dinitrophenoxymethylchloroethyl-ether propaIgyl-ether -CH,OOH:CH1C1 o-- ll- 0 1 -un Ha I 5 'm C2H5CHNCM (1:II. ,(Il-@N 02 I I I N07 (7) 10 N02 4. Compound according to claim 1 wherein such 6. Compound according to claim 1 wherein such compound 2-sec.-butyl-4,6-dinitrophenoxymethyl-' compound is 2-tert.-butyl-4,6-dinitrophen0xymethylallyl-ether propargyl-ether OCHr-OCH2-CH=CH2 0-cII,o-0Hl-oE OH: I 15 om l CzH5C 7H- NO2 CH3? -N0z NO: I NO: I

UER'EI FWATE 0F CORREGEIUN f Patent No. 3,683,031 Dated August 8, 1972 Inventor(s) Gerhard Zumach et a1 It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

(301. II. line 62 "oxyearbonyl" should be oxycarbonyl Col. 3 line 55 "'chloromethylcjrontonie" should be chloromethylcrotonic Col. 5 line l should be Col. 5, line 16 I.

"cocroaches" should be cockroaches Col. 13, I Corngound 19 should be v UNITED STA'IES PAflifN'r 01mm EER'IWICA'IE OF CORRECTION Patent No. 3 ,683 {031. Dated August 8, 1972 Inventor(s) Gerhard Zumachet a1 Z It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

C01. l9 '1ine1O should be C01. 19 line 2? "-CH2 -C=C-CH2-C1" sheuld be ma -n c-cu -cl Signed and sealed this 9th day of January 1973..

(SEAL) Attest:

EDWARD M.FLETCHER,JR. I ROBERT GOTTSCHALK Attesting Officer Commissioner of Patents 

2. Compound according to claim 1 wherein such compound is 2-sec.-butyl-4,6-dinitrophenoxymethyl-4-methyl-pentyl-(2)-ether
 3. Compound according to claim 1 wherein such compound is 2-sec.-butyl-4,6-dinitrophenoxymethyl-2-chloroethyl-ether
 4. Compound according to claim 1 wherein such compound is 2-sec.-butyl-4,6-dinitrophenoxymethyl-allyl-ether
 5. Compound according to claim 1 wherein such compound is 2-sec.-butyl-4,6-dinitrophenoxymethyl-propargyl-ether
 6. Compound according to claim 1 wherein such compound is 2-tert.-butyl-4,6-dinitrophenoxymethyl-propargyl-ether 